Scott, I sent you an e-mail. Don't know if it's work or not, but I have lots of info (good) on Larry Peto, A bunch of us have used him to build our motors with great results. He's not cheap, but you get what you pay for and when it comes to these floating money eaters, it's worth it. He did my heads on the 454 and all the machine work on my 509. I'm sure you'll get a lot more info tossed in here shortly on Larry.
Craig